Voters in Wisconsin's GOP primary Tuesday are poised to help former Massachusetts Gov. Mitt Romney wrap up his dogged, well-financed quest for the Republican presidential nomination.
But the winner-take-all primary and Romney's drawn-out battle with former Pennsylvania Sen. Rick Santorum have been overshadowed by the campaign to recall GOP Gov. Scott Walker, whose anti-union efforts since his 2010 election have cleaved the Badger State.